This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Architecture SSO Fundamentals Single Sign-On (SSO) allows users to authenticate once and access multiple applications without re-entering credentials. It improves security by centralizing authentication and reducing password fatigue. SAML 2.0 Security Assertion Markup Language (SAML) is the mature standard for enterprise SSO: AssertionConsumerServiceURL=" https://app.example.com/saml/acs " Destination=" https://idp.example.com/saml/sso " IssueInstant="2026-05-12T10:00:00Z"> https://app.example.com Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress"/> SAML response parsing from signxml import XMLVerifier import xml.etree.ElementTree as ET def parse_saml_response(response_xml): Verify the signature…